<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图 -->
        <el-card>
            <!-- 添加角色按钮区域 -->
            <el-row>
                <el-col :span="4" style="margin-bottom:17px">
                    <el-button type="primary" @click="addRoleDialogVisible = true">添加角色</el-button>
                </el-col>
            </el-row>

            <!-- 角色列表区域 -->
            <el-table :data="rolelist" border stripe>
                <!-- 展开列 -->
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <el-row :class="['bdbottom',i1 === 0 ? 'bdtop' : '','vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
                            <!-- 渲染一级权限 -->
                            <el-col :span="5">
                               <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col >  
                            <!-- 渲染二级和三级权限 -->
                            <el-col :span="19">
                                <!-- 通过 for 循环嵌套渲染二级权限 -->
                                <el-row :class="[i2 === 0 ? '' : 'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                                    <el-col :span="6">
                                        <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">
                                            {{item2.authName}}
                                        </el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <!-- 三级权限 -->
                                    <el-col :span="18">
                                        <el-tag type="warning" closable @close="removeRightById(scope.row,item3.id)" v-for="item3 in item2.children" :key="item3.id">
                                            {{item3.authName}}
                                        </el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                    </template>
                </el-table-column>
                <!-- 索引列 -->
                <el-table-column label="#" type="index"></el-table-column>
                <!-- 数据列 -->
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
                <el-table-column label="操作" width="340px">
                    <template slot-scope="scope">
                        <el-button type="primary" icon="el-icon-edit" size="medium" @click="editRoleById(scope.row.id)">编辑</el-button>
                        <el-button type="danger" icon="el-icon-delete" size="medium" @click="removeUserById(scope.row.id)">删除</el-button>
                        <el-button type="warning" icon="el-icon-setting" size="medium" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>

        <!-- 添加角色对话框 -->
        <el-dialog title="添加角色" :visible.sync="addRoleDialogVisible" width="50%" @close="addDialogClosed">
                <!-- 内容主体区域 -->
            <el-form ref="addFormRef" :rules="addFormRules" :model="addForm" label-width="80px">
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="addForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="addForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="addRoleDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addRole">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 编辑角色对话框 -->
        <el-dialog title="编辑" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
            <el-form ref="editFormRef" :rules="addFormRules" :model="editForm" label-width="80px">
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="editForm.roleName" disabled></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="editForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editRoleInfo">确 定</el-button>
            </span>
        </el-dialog>
            
        <!-- 分配权限的对话框 -->
        <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
            <!-- 树形控件 -->
            <el-tree node-key="id" :default-checked-keys="defKeys" default-expand-all
                     show-checkbox :data="reightsList" :props="treeProps" ref="treeRef">

            </el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>
export default {    
    name:'Roles',
    data(){
        return{
            //所有角色列表数据
            rolelist:[],
            //控制分配权限的对话框的显示与隐藏
            setRightDialogVisible: false,
            //所有权限的数据
            reightsList:[],
            //树形控件的属性绑定对象
            treeProps:{
                label:'authName',
                children:'children',
            },
            //默认选中的节点Id值数组
            defKeys:[],
            //当前即将分配权限角色的id
            roleId: '',
            //控制添加角色的对话框的显示与隐藏
            addRoleDialogVisible: false,
            //添加的角色
            addForm:{},
            //添加角色的验证规则
            addFormRules:{
                roleName:[
                    {required: true, message:'请输入角色名称',trigger:'blur'},
                ],
                roleDesc:[
                    {required: true, message:'请输入角色描述',trigger:'blur'}
                ]

            },
            //输入的角色
            addForm:{
                roleNName:'',
                roleDesc:''
            },
            //控制编辑角色的对话框的显示与隐藏
            editDialogVisible: false,
            //根据id查询到当前的角色数据
            editForm:{},               
        }
    },
    created(){
        this.getRolesList();
    },
    methods:{
        //获取所有的角色列表
        async getRolesList(){
            const {data: res} = await this.$http.get('roles');
            if(res.meta.status !== 200){
                return this.$message.error("获取角色列表失败!");
            }
            this.rolelist = res.data;
            console.log(this.rolelist);
        },
        //根据id删除对应的权限
        async removeRightById(role,rightId){
            //弹框提示用户是否要删除
            const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err => err)

            if(confirmResult !== 'confirm'){
                return this.$message.info('已取消删除!');
            }

            const {data: res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`);
            if(res.meta.status !== 200){
                return this.$message.error('删除权限失败!');
            }
            //刷新列表
            /* this.getRolesList(); */
            role.children = res.data;
        },
        /* 展示分配角色的对话框 */
         async showSetRightDialog(role){
             this.roleId = role.id;
            //展开对话框之前获取所有数据
            const {data: res} = await this.$http.get('rights/tree');
            if(res.meta.status !== 200){
                return this.$message.error('获取所有权限数据失败!');
            }
            //把获取到的权限数据保存到 data中的reightsList对象中 
            this.reightsList = res.data;
            
            //递归获取三级节点的Id
            this.getLeafKeys(role,this.defKeys);
            //展开对话框
            this.setRightDialogVisible = true;
        },
        
        //通过递归的形式，获取角色下的三级权限的id，并保存到 defKeys 数组中
        getLeafKeys(node, arr){
            //如果当前 node 节点不包含children属性，则是三级节点
            if(!node.children){
                return arr.push(node.id);
            }
            node.children.forEach(item => this.getLeafKeys(item, arr))
        },

        //监听分配权限对话框的关闭事件
        setRightDialogClosed(){
            this.defKeys = [];
        },
        // 点击为角色分配权限
        async allotRights(){
            const Keys = [
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()
            ]

            const idStr = Keys.join(',')

            const {data: res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids: idStr});
            if(res.meta.status !== 200){
                return this.$message.error('分配权限失败!')
            }
            this.$message.success('分配权限成功!');
            this.getRolesList();
            this.setRightDialogVisible = false;
        },
        /* 删除角色 */
        async removeUserById(id){
            const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(error => {
                return error;         
            });

            if(confirmResult !== 'confirm'){
                return this.$message.info('已取消删除!');
            }
            console.log('@@',id);
            const {data: res} = await this.$http.delete('roles/'+ id);
            if(res.meta.status !== 200){
                return this.$message.error('删除角色失败!');
            }
            this.$message.success('删除角色成功!');
            //刷新页面
            this.getRolesList();
        },
        /* 添加角色 */
        addRole(){
            this.$refs.addFormRef.validate(async valid =>{
                if(!valid){
                    return this.$message.error('请输入正确的信息!');
                }
                //验证通过 可以发起添加用户的网络请求
                const {data : res} = await this.$http.post('roles',this.addForm);
                if(res.meta.status == 201){
                    this.$message.success('添加角色成功!');
                    //隐藏添加用户的对话框
                    this.addRoleDialogVisible = false;
                    //重新获取用户的数据
                    this.getRolesList();       
                }else{
                    //添加用户数据失败
                    this.$message.error('添加用户失败!');
                    //隐藏添加用户的对话框
                    this.addRoleDialogVisible = false;
                }   
            });  
        },
        /* 监听关闭添加对话框事件 */
        addDialogClosed(){
            this.$refs.addFormRef.resetFields();
        },
        
        /* 获取当前编辑角色的信息 */
        async editRoleById(id){
            //获取当前角色数据
            const {data: res} = await this.$http.get('roles/' + id);
            if(res.meta.status !== 200){
                return this.$message.error('获取角色数据失败!');
            }
            this.editForm = res.data;
            //显示编辑对话框
            this.editDialogVisible = true;

        },
        /* 提交编辑的角色信息 */
        editRoleInfo(){
            this.$refs.editFormRef.validate(async valid =>{
                if(!valid){
                    return this.$message.error('请输入正确的信息!');
                }
                //验证通过 可以发起添加用户的网络请求
                const {data : res} = await this.$http.put('roles/' + this.editForm.roleId,
                                {roleName:this.editForm.roleName, roleDesc:this.editForm.roleDesc});
                if(res.meta.status !== 200){
                    //添加用户数据失败
                   return this.$message.error('编辑角色失败!');  
                } 

                    this.$message.success('编辑角色成功!');
                    //隐藏添加用户的对话框
                    this.editDialogVisible = false;
                    //重新获取用户的数据
                    this.getRolesList();   
            });
        },

        /* 监听关闭编辑对话框事件 */
        editDialogClosed(){
            this.$refs.editFormRef.resetFields();
        },
    }
}
</script>

<style scoped>
    .el-tag{
        margin: 7px;
    }
    .bdtop{
        border-top: 1px solid #eee;
    }
    .bdbottom{
        border-bottom: 1px solid #eee;
    }
    .vcenter{
        display: flex;
        align-items: center;
    }
</style>